Double champions in MMA
Double belt, double champion is an achievement made by mixed martial artists in several categories.
Controversies
Some sports experts argue that a double championship could be detrimental to the divisions that the champion competes in. The progression of the divisions may be blocked, which can be considered unfair to other challengers. This can be due to the fact that MMA athletes cannot compete in short periods of time and must have adequate time for recovery and training camp. Furthermore, athletes need time to adjust their weight, which can further delay title fights.Historical double-champions of the main associations
Max Holloway of UFC, who won the featherweight and BMF titles, is not considered as a double champion, as the BMF title is not an official "weight class title".List of double champions by country and organization
| Nº | Country | Champions |
| 1º | 9 | |
| 2º | 4 | |
| 3º | 3 | |
| 3º | 3 | |
| 4º | 2 | |
| 5º | 1 | |
| 5º | 1 | |
| 5º | 1 | |
| 5º | 1 | |
| 5º | 1 | |
| 5º | 1 | |
| 5º | 1 |
| Nº | Org. | Champions | Nationalities |
| 1º | UFC | 11 |  |